Device for side-dressing circular saws



(No Model.)

- 5 W. HATPIELD.

DEVICE FOR SIDE DRESSING UIRGULAR SAWS. N0. 504;'726.

Patented Sept. "12, 1893.

UNITED STATES PATENT GEETCE,

lVlLLIAM HATFIELD, OF FORT WAYNE, INDIANA.

DEVICE FOR SIDE-DRESSING CiRCULAR SAWS.

SPECIFICATION forming part of Letters Patent N0. 504,726, dated September 12, 1893.

Application tiled May l, 1893. Serial No. 4721647- (NO mOlL) To @ZZ whom t may concern:

Be it kn own that l, WILLIAM HATEIELD, a citizen of the United States, residing at Fort lVayne, in the county of Allen, in the State of Indiana, have invented certain new and useful Improvements in Machines for Side-Filing Circular Saws; and I do hereby declare 'that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the saine, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to improvements in devices for side dressing or nling saw teeth of circular saws.

The object of my invention is to provide a cheap and convenient device for side filing circular saws so constructed and arranged that the operating tile can be readily adjusted at any desired angle with reference to the face of the saw teeth, rigidly secured and easily operated in said position by means of suitable guides, thereby insuring evenness and uniformity in its operation without requiring special skill or precaution on the part of the operator.

llly invention consists of an upright standard having lateral arms provided with adjustable gage or set screws adapted to bear against the sides of the saw when in use, an oblique slot in the upper part thereof in which a suitable file is adjustably secured in such a position as to bear against the swaged surface of the saw teeth when in operation, a spring gage plate adapted to rest upon the upper surfaces of the saw teeth, and a suitable handle by which the operator guides the device to its work.

The novel feature of my invention consists in the arrangement of the several parts whereby the file is maintained uniformly at any desired angle relative to the swaged surfaces of the teeth in such a manner that said surfaces will be filed alike.

The object of my invention is accomplished by the mechanism illustrated in the accompanying drawings forming part of this speciiication in which similar letters of reference indicate corresponding parts in the several views.

Figure l is a front view of my invention in position on a circular saw, in dotted outline, showing the arrangement of the lateral arms with their gage screws and the spring gage plate secured thereto. Fig. 2 is a side view of the same showing the operating handle and the manner of securing the file in the oblique slot. Fig. 3 is an enlarged detail of the file in position and in engagement with the swaged surface of a saw tooth, taken on the line 4-4 of Fig. l.

The standard C of suitable material, preferaoly of metal, and of any desired size, is provided with the lateral arms d, d, and e, e, preferably cast integrally therewith the said arms having suitable screw threaded perforations into which the gage or set screws G, G, and g, g, are respectively adjusted. The standard C is provided at its upper end with a deep oblique slot h, Figs. 2 and 3, in which the iile D is rigidly secured by means of the thumb screw F arranged in a suitable perforation in said standard, and also with a vertical or downwardly projecting lug fn at the point of union of the armsd, d; this lug has a horizontal slot or recess in which the spring gage plate E is removably secured in a well understood manner, as seen in Fig. 3. The lower end of said standard C is also provided with a screw threaded perforation in which the gage screw h is adjustably secured. At any proper point on the standard C, preferably at a point thereon between the inner ends of the arms e, is rigidly secured any suitable handle m. The ends of the spring gage plate have a slight upward curvature to permit the operator to slide it freely over the top of the said teeth. It is obvious, from the above description that any number of lateral arms e may be provided, and that the standard C may be fashioned into various forms or that the file D may be secured in the sloth in a variety of ways without departing from the spirit ot' my invention.

rIhe manner of using and the mode of operation of my improvement thus briefly described is as follows: The file D being rigidly secured in the slot h by the thumb screw F or other proper manner, the operator places the device in position on the saw A, properly mounted on the arbor B, with the spring gage IOC) plate E resting upon the upper surfaces of the teeth a near its center. The set screws G are then so adjusted as to bring the ends of the plate E'down upon the teeth also; the said p late will thus form an arc of a circle of practically equal area with that of the saw and will be adapted to rest upon and slide over any and all of the said teeth when the saw is rotated. The gage screws g, g and h are then so adjusted as to bring the file D in engagement with the swaged edge of the teeth a at any desired angle, as may be seen in Figs. 2 and 3. The operator now grasps the handle m and with the weight'of the device resting upon the surfaces of the saw teeth and the gage or set screws g, g, and 7L resting against the side of the saw A and the file D engaging the side of the tooth a atthe desired angle, he holds the device firmly and uniformly in that position and either slowly rotates the saw A on the arbor B or moves the device thus supported and gaged by the saw itself, upon the surface of the saw as described until the edges of all the teeth upon one side of the saw have been properly and uniformly filed. He then reverses the position of the dev ice upon the saw by placing it upon the other side thereof, in the same relative position to the said teeth, when the same operation of tiling is repeated as before described until all the teeth are properly filed or sharpened.

Having thus described my invention and the best manner in which the same is to be applied, what l claim as new and useful, and desire to secure by Letters Patent, is-

l. A device for tiling saw teeth, comprising the standard C having an oblique slotbin the upper end thereof a gage screw in the other extremity, a thumb screw F adapted to secure the file D in said slot, and provided with a spring gage plate E removably secured in said standard, the lateral arms d having the gage or set screws G in the outer extremity thereof, for regulating the ends of the gage plate and the lateral arms c having the gage screws g for regulating the position of said file relatively to the swaged surface of the said tooth, all substantially as set forth and described. Y 1

2.V In a device for side filing saw teeth, the combination of the standard Chaving a slot b in one end thereof and a gage screw h in the other extremity, and provided with the lateral arms d having setscrews G, in the extremities thereof and the lateral arms ,e having the gage screws g in the ends thereof, with the spring gage plate E removably mounted in said standard, the tile D securedin said slot by the set screw F, and the operating handle m, all substantially as described. Signed by me, at Fort Wayne, Indiana, this 22d day of April, 1893.

WILLIAM HATFIELD. W'itnesses:

WILLIAM S. OROURKE, WALTER G. BURNS. 

